最近在測試的過程當中, 發現了SpringBoar的一個問題:app
SpringBoard[53] <Error>: CGContextTranslateCTM: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.測試
同時也發現了應用有類型的問題:thread
Aug 6 13:11:50 Tour1[17353] <Error>: CGContextSaveGState: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.bug
蘋果的連接以下:developer
https://forums.developer.apple.com/thread/13683apple
應該是iOS9系統引入的bug.vi